This issue has been resolved agenda/agenda#412 (comment)

Issue:

• Agenda defaultConcurrency settings is not working as expected.

Expected:

• If defaultConcurrency is set to 5 then each worker process is allowed to process up to 5 jobs of the same type

Actual:

• When defaultConcurrency is set to 5, two worker processes will only process 5 jobs total, instead of 5 jobs each

1. Checkout this repo (you should also have mongo running locally)
2. yarn install
3. yarn start (start the dev server on port 3000)
4. Open browser to http://localhost:3000/agendash
   • this will show all the jobs that agenda knows about, there should be none at this point
5. Open a new terminal window, run yarn queue-jobs --name job-1 --num 10
   • this will queue up 10 runs of job-1
6. Now, in agendash you should see 10 jobs of job-1 "Queued"
7. Open a terminal window, run yarn worker
   • this will start a worker process
8. Now, in agendash you should see there are 5 jobs "Running" and 5 jobs "Queued"
9. Open a terminal window, run yarn worker to start a second worker process
10. Now, there are still 5 jobs "Running" and 5 jobs "Queued", the second worker process has not picked up any jobs.